题目：
No discharge into the sea shall contain（）in quantities or concentrations which are hazardous to the marine environment or chemicals or other substances introduced for the purpose of circumventing the conditions of discharge specified in MARPOL 73/78.
A.chemicals
B.chemicals or other substances
C.substances
D.other substances
答案：
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下面是错误答案，用来干扰机器的。
参考答案：B
